Transmission chain for v-type pulleys



Sept. 8, 1953 E. KARIG TRANSMISSION CHAIN FOR v-TYPE PULLEys Filed Sept. 2 9, 1950 /nven for:

tions and purposes strands of links and the Patented Sept. 8, 1953 PULLEYS TRANSMISSION CHAIN FOR Vv-TYPE Erhardt Karig,` Bad Homburg vor der Hohe, Germany, assignor to Patentverwertung W. Rei-A mers, G. m. b. Germany Application September 2 In Switzerland 1o Claims'.

Metal link-'chains adapted to extend between V-type or so-called conical pulleys and provided with rollable pressure bodies arranged in pairs or multiples crosswise of the chain and rotatable about axes parallel to the direction of travel of the chain are already known in transmission mechanisms. In some of these chains, the pressure bodies (balls or rollers) are encased within the 'body of the chain and project beyond opposite lateral edges of the chain in such a-manner as to frictionally gripv the opposed conical` faces of thepu1leys. Y o" A 1V'v VSuch chains in the past have been subject-to the disadvantage that the pitch or thickness of the chain is a limiting factor upon the size of the vpressure bodies that may be effectively used with the chain. Consequently, any increase in the size of the pressure bodies requires a corresponding increase in the pitch of the chain to accommodate the pressure bodies. Thus, whatever advantages that might be gained by using pressure bodies of larger size are more or less nullified by the necessity for making the chain of oversize pitch, andthe greater the pitch, the fewer the links there are per unit length of'chain, andconsequently fewer pressure bodies come into en'- gagement with the pulleys during the travel of the chain. v' Y yAn important advantage of the chain of the 'present invention resides in the construction by which the pressure bodies are mounted, not within the chain, but in a manner such as to surabout the latter. Byyirtue ofthis construction, the links composing the chain transmit the tensile .load in a straight unweakened line from link advantage, the diameter of the pressure rings may be optionally selected to best suit the condifor which the chain is designed.

" Another object of the invention is to provide a chain of the above character in which the chain is composed of two connected parallel-extending pressure rings are arranged in pairs upon the links crosswise lo f the chain with the rings in peripheral contact at points intermediate thewidth of the chain.l

Still another object of the invention is 'tc pro'- vide a chain composed of a single strand of links having pressure rings mounted .thereon so 'asto -completely encircle the chain. ',It'has4 been -found schematically;

H., Bad Homburg vor der Hohe,

o, serial No. 187,647

that such a chain-having only a single ringshapedbody on each link presents considerable advantages. They reside more particularly in that the running circle radius of such a chain is following description of the arrangement according to the invention.

The invention is illustrated in the accompany- Ving drawings.

Figure 2 is a transverse cross-sectional View :through the chain of. Figure 1 showing one pair of pressure rings mounted thereon the manner in which the rings engage opposite conical discs of a V-pulley; Figure 3 is a view', in part cross-sectional, of a section of chain viewed at right-angles' to Figure 2, or parallel to a side edge of the chain;

Figure 4 is a View mainly in cross-section of the chain section taken on the line A-B of Figure 2;

Figure 5 is a transverse` cross-sectional view Vthrough a chain of the single-strand type,l showing the manner in which the pressure rings engage the yconical discs :of a pulley;

Figure 6 is an edge view'of a section of chain vcorresponding to that of Figure 5, with the pressure rings shown in cross-section; and

Figure '7 is view in cross-section ofthe chain section of Figure 6 but viewed from above or parallel to the upper face of the chain.

In Figure 1 of the drawing, is shown a variable vspeed transmission comprising two V-type pulleys, ea ch provided 'withopposed conical discs G,

Vpins I1 connecting them.

longitudinally oiset with respect to the plates pf an adjacent row. cent their ends to provide eyes i3, two vfor each plate, through which freely pass link pins 4 for The plates are A punched Vadiamaintaining the link platcsiin interdigitated and articulated relation with the :plates pf .one longttudinal row of plates projecting into `the space between the plates of two adjacent rows of plates. While each link plate in eiect pQnSttnteS it element of the chain, however, for present purposes the several corresponding plateselranged in a row cross-wise of each strand of the chain and hinged upon two successive link pins 4 may be .considered to constitute .a link. Certain ofthe plates or all of them composing the gross-.section Aof a strand .ci .the ohainconstitute a running surface around which the inner peripheral :surface of a roller .can turn. If desired, .a `bearing ring for the roller ring .(not shown) may also 'be placed around the link plates i. Thus, the rings i encircle the chain `lin-ks 2, turning :loosely on them. The distances between the :rollers `in the direction of the chain length are fixed by link pins 4 :passing through eyes `3 so .as to extend laterally between and connect the two .strands of the chain and these pins also transmit the fiorces from the rollers l :to the link plates 12 and vice versa. For holding the pins A in place against axial displacement holders 15 are provided, which bridge .across the .upper `race .of the .chain .and bear against its opposite sides. "These holders Vhave `a stirrup-ilike form with 'bent-away .ends lI forengaging the ends .of .the linkpins vllyfigurefZ, and have extensions ,6 lwhich bear .against :the outer sides of the plates. vThis .arrangement serves two purposes. On `the ,one lia-nd, the pins 4 are prevented from .shifting axially and, on .the other hand, the stirrup 5 holds the chain :strands together as a unit. Abutments for the rollers in the longitudinal direction or the chain .are provided by ear-like projections `2a on the'link plates, the ears of alternate "link plates engaging, :directly or indirectly, ,opposite sides ofthe :pressure rings. The link pins 4 are capable .of tur-ning freely Vwithin thezeyes :3 of the link plates, so as tof utilise the entire peripheral surface .of `the :pin )for power transmission andthereby `.ensure uniform wear.

In Figures 5 to 7 la constructional form is shown, whichhas only a .single tension strand. The tension strand vHl'. 4is constructedin ,substantially the'same `manner as vthe strands I or yII above described, namely of link plates I6 vand link The latter are :loosely rotatable in the link plates and secured against falling out by being `riveted .over .at rtheir ends. The `link rplates 16 of each .chain link form the support vfor a Yring-shaped pressure .body i, lthe pressure rings bearing against ears 'I8 of the plates LIS, which ltransmit Yfrom the'rings to the chain the yforces acting in the longitudinal direction of the chain.

I claim:

l. in a transmission chain adapted for use with V-type pulleys, the combination comprising a series of links `connected in articulated relation, -a plurality yof pressure V.rings .encircling the `links at spaced Adistances lengthwise of the chain Vand free to rotate upon said links about axes substantially parallel to the length of the chain and means for preventing displacement of said rings in a direction lengthwise of the chain.

s2. a transmission cha-in: adapted for use .with v-tyoe pulleys, the combination :comprising a series of links connected in articulated relation, a plurality of pressure rings encircling the links at spaced distances lengthwise of the chain and free to rotate upon said links about axes substantially parallel to the length of the chain and zbllfmentsupon the chain for preventing displacement @f said rings in a direction lengthwise .of the chain.

3. In a transmission chain adapted for use with V-type pulleys, the combination comprising a ,series oi links connected in articulated relation, said links each comprising a plurality of link 'plates assembled in side-by-side relation with certain of the plates of one link interdigitated with :the plates of a succeeding linkJ a plurality ci `.pressure rings finclurzling the links at spaced distances lengthwise of the chain and lfree -to rotate .upon said `links about axes substantially parallel to the length of the cha-in and means .carried .bythe chain for preventing displacement of said rings in a direction lengthwise of the chain.

=4.In a .transmission chain adapted for vuse with V-ty-pe pulleys, the combination compris- .ing a .series of links connected in articulated relation, said links each comprising a plurality vof link yplates assembled in side-by-side relation with .certain of the plates of one link interdigi- Vtailed .With the plates of .a vsucceeding link, a plurality of vpressure rings encircling Vthe links at .soa-ced distances .lengthwise of the Chamond free il@ rotate upon .said links about axes substantially parallel vto the length of the chain and ears ycarried by the links for preventing .displacement of said rings in a .direction lengthwise of the chain..

.lin atransmission chain of the .single-strand type .adapted Afor use with -Vtype pulleys, the .ernbination .comprising a series of links connected in articulated relation, a plurality of pressure Vrings .encircling the links 'at spaced distances lengthwise of the chain and free to ,rot-.ate upongsaid links about axes substantially medially sand :Parallel to the length .O f the chain with the :eircumferences `of the rings projecting laterally beyond opposite .sides of the chain :for pulley :engagement .and ymeans .for preventing displacement of said rings .in a :direction 'lengthwise of the chain.

r6. .1n atransmission chain of the Isingle-strand .type adapted -for use with vV-.type pulleys, the combination comprising a series of links connected in articulated relation, a single pressure ring `,encircling each link and free to rotate upon said linkabout an axis substantially medially and parallele-.tothe length of 'the chain with the circumference of the ring projecting laterally 'beyond opposite edges of the chain for pulley en- ;.gfgement :and means carried by the .chain for preventing ydisi'rlacement of said ring iin a direction `lengthwise of the chai-n.

Z7. In a ztransmission chain of the single-strand type yadapted for use with V-type pulleys, the -.comblnation comprising a series of links connected in articulated relation, each of said links comprising a plurality `of link plates assembled in .side-by-side vrelation with .certain of the plates of one link 4interdigitated with Vthe plates of a succeeding .a plurality .of pressure rings .en-

circl the links at spaced distances lengthwise to rotate upon said links about axes substanof the chain and free to rotate about axes subtially parallel to the length of the chain.

stantially medially and parallel to the length of 10. In a transmission chain adapted for use the chain with the circumferences of the rings with V-type pulleys, the combination comprising projecting laterally beyond opposite edges of the a plurality of laterally-spaced strands each inof said ring, said abutments together preventing of a succeeding link, link pins connecting the wise of the chain. tween and connecting the strands for unitary 8. In a transmission chain adapted for use movement, a plurality of pressure rings encirwith v-type pulleys, the combination comprising cling the links of the strands at spaced distogether in articulated relation means connectparallel to the length of the chain the rings ing the strands for unitary movement a plucorrespondingly located lengthwise of the cham rality of pressure rings encircling the links of Sing in peripheral Contact at points located insaid strands at spaced distances lengthwise of termediate the strands, and said link pins havpreventing displacement of said rings in a direche Cham and engagmg the Sldes of the links tion lengthwise of the chain. and the ends of the link pins upon opposite edges 9. In a transmission chain adapted for use of the chain.

with V-type pulleys, the combination compris- ERHARDT KARIG.

ing a plurality of laterally-spaced strands each including a longitudinal series of links, link pins References Cited in the me 0f this patent connecting the links in articulated relation and UNITED STATES PATENTS extending between and connecting the strands for unitary movement, and a plurality of preslugglls M Name Date sure rings encircling the links of the strands at amer Mar' 16 1937 

